桩基础单桩静载试验及数值模拟

Single pile static load test of pile foundation and the analysis of numerical simulation

针对单桩的承载沉降规律及试验结果与数值模拟结果的差异较大的问题,采用试验分析和数值模拟相结合的方法,运用FLAC3D有限差分软件进行单桩数值静载试验模拟,通过对比实测数据和模拟数据结果发现：桩顶沉降误差为0.03mm,是实测值的6.3%.通过桩-土体的沉降计算接触面相对位移发现,粘性土极限位移为6-12 mm,施加到最后一级载荷时,桩-土体的相对位移未达到此值,因此,桩侧阻力载荷分担曲线呈上升趋势.

Aiming at the problem of the differences between experimental results and numerical simulation results and the load - settlement rules of the single pile, this paper adopted the method of experimental analysis combined with numerical simulation, and performed the numerical simulation of single pile static test using FLAC3D Finite difference software. The result of comparing the simulation data and the measured data shows that pile top settlement error is 0.03 mm, which is 6.3% times of measured value, and it proved that the numerical simulation has feasibility by contrast. And through the settlement of pile and soil to calculate relative displacement of contact surface, viscous soil limit displacement is 6 -12 mm. When it is applied to the last level of the load, the relative displacement of pile soil did not reach this value, so pile side resistance load sharing curve is on the rise.